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Diffstat (limited to 'src/mame/machine/lsasquad.cpp')
-rw-r--r--src/mame/machine/lsasquad.cpp107
1 files changed, 14 insertions, 93 deletions
diff --git a/src/mame/machine/lsasquad.cpp b/src/mame/machine/lsasquad.cpp
index ebaecf016ad..b721f71c891 100644
--- a/src/mame/machine/lsasquad.cpp
+++ b/src/mame/machine/lsasquad.cpp
@@ -86,91 +86,6 @@ READ8_MEMBER(lsasquad_state::daikaiju_sound_status_r)
return m_sound_pending ^ 3;
}
-
-/***************************************************************************
-
- LSA Squad 68705 protection interface
-
- The following is ENTIRELY GUESSWORK!!!
-
-***************************************************************************/
-
-READ8_MEMBER(lsasquad_state::lsasquad_68705_port_a_r)
-{
- //logerror("%04x: 68705 port A read %02x\n", space.device().safe_pc(), m_port_a_in);
- return (m_port_a_out & m_ddr_a) | (m_port_a_in & ~m_ddr_a);
-}
-
-WRITE8_MEMBER(lsasquad_state::lsasquad_68705_port_a_w)
-{
- //logerror("%04x: 68705 port A write %02x\n", space.device().safe_pc(), data);
- m_port_a_out = data;
-}
-
-WRITE8_MEMBER(lsasquad_state::lsasquad_68705_ddr_a_w)
-{
- m_ddr_a = data;
-}
-
-
-
-/*
- * Port B connections:
- *
- * all bits are logical 1 when read (+5V pullup)
- *
- * 1 W when 1->0, enables latch which brings the command from main CPU (read from port A)
- * 2 W when 0->1, copies port A to the latch for the main CPU
- */
-
-READ8_MEMBER(lsasquad_state::lsasquad_68705_port_b_r)
-{
- return (m_port_b_out & m_ddr_b) | (m_port_b_in & ~m_ddr_b);
-}
-
-WRITE8_MEMBER(lsasquad_state::lsasquad_68705_port_b_w)
-{
- //logerror("%04x: 68705 port B write %02x\n", space.device().safe_pc(), data);
-
- if ((m_ddr_b & 0x02) && (~data & 0x02) && (m_port_b_out & 0x02))
- {
- m_port_a_in = m_from_main;
- if (m_main_sent)
- m_mcu->set_input_line(0, CLEAR_LINE);
- m_main_sent = 0;
- //logerror("read command %02x from main cpu\n", m_port_a_in);
- }
-
- if ((m_ddr_b & 0x04) && (data & 0x04) && (~m_port_b_out & 0x04))
- {
- //logerror("send command %02x to main cpu\n", m_port_a_out);
- m_from_mcu = m_port_a_out;
- m_mcu_sent = 1;
- }
-
- m_port_b_out = data;
-}
-
-WRITE8_MEMBER(lsasquad_state::lsasquad_68705_ddr_b_w)
-{
- m_ddr_b = data;
-}
-
-WRITE8_MEMBER(lsasquad_state::lsasquad_mcu_w)
-{
- //logerror("%04x: mcu_w %02x\n", space.device().safe_pc(), data);
- m_from_main = data;
- m_main_sent = 1;
- m_mcu->set_input_line(0, ASSERT_LINE);
-}
-
-READ8_MEMBER(lsasquad_state::lsasquad_mcu_r)
-{
- //logerror("%04x: mcu_r %02x\n", space.device().safe_pc(), m_from_mcu);
- m_mcu_sent = 0;
- return m_from_mcu;
-}
-
READ8_MEMBER(lsasquad_state::lsasquad_mcu_status_r)
{
int res = ioport("MCU")->read();
@@ -178,10 +93,13 @@ READ8_MEMBER(lsasquad_state::lsasquad_mcu_status_r)
/* bit 0 = when 1, mcu is ready to receive data from main cpu */
/* bit 1 = when 0, mcu has sent data to the main cpu */
//logerror("%04x: mcu_status_r\n",space.device().safe_pc());
- if (!m_main_sent)
- res |= 0x01;
- if (!m_mcu_sent)
- res |= 0x02;
+ if (m_bmcu)
+ {
+ if (!m_bmcu->get_main_sent())
+ res |= 0x01;
+ if (!m_bmcu->get_mcu_sent())
+ res |= 0x02;
+ }
return res;
}
@@ -193,10 +111,13 @@ READ8_MEMBER(lsasquad_state::daikaiju_mcu_status_r)
/* bit 0 = when 1, mcu is ready to receive data from main cpu */
/* bit 1 = when 0, mcu has sent data to the main cpu */
//logerror("%04x: mcu_status_r\n",space.device().safe_pc());
- if (!m_main_sent)
- res |= 0x01;
- if (!m_mcu_sent)
- res |= 0x02;
+ if (m_bmcu)
+ {
+ if (!m_bmcu->get_main_sent())
+ res |= 0x01;
+ if (!m_bmcu->get_mcu_sent())
+ res |= 0x02;
+ }
res |= ((m_sound_pending & 0x02) ^ 2) << 3; //inverted flag
m_sound_pending &= ~0x02;